[cfe-dev] [libcxx]: a testsuite bug involving boolean type and values

[ZhangXiongpang]

I saw the code in
    test/depr/depr.c.headers/stdbool_h.pass.cpp
as follows:
--------------------------------------------------
#include <stdbool.h>

#ifndef __bool_true_false_are_defined
#error __bool_true_false_are_defined not defined
#endif

#ifdef bool // why bool should not be defined?
#error bool should not be defined
#endif

#ifdef true // idem
#error true should not be defined
#endif

#ifdef false // idem
#error false should not be defined
#endif
--------------------------------------------------

Why bool/true/false should not be defined?
Is it a bug of the stdbool_h.pass.cpp?
I think it should be:
--------------------------------------------------
#ifndef bool
#error bool should not defined
#endif

#ifndef true
#error true should not defined
#endif

#ifndef false
#error false should not defined
#endif
--------------------------------------------------

Because the section 7.18 of  n1548.pdf
<http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1548.pdf>   says:
--------------------------------------------------
7.18 Boolean type and values <stdbool.h>
1 The header <stdbool.h> defines four macros.
2 The macro bool expands to _Bool.
3 The remaining three macros are suitable for use in #if preprocessing
directives. They are true which expands to the integer constant 1, false
which expands to the integer constant 0, and _bool_true_false_are_defined
which expands to the integer constant 1.
--------------------------------------------------



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